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AMTI-SIPHON DEVICE OR ELECTRICALLY
~
OPERATED FUEL STOP VALVE
- - -
--~~~)"""";-:::";-:::::~/~-7::~~~F~U~E~L~TA~N~K~T:o:p ~L~E~V:E~L~:/""~~i~~~~""","'-I
fU E L
~
FUEL LINE BELOW FUEL TANK lOP LEVEL
ANTI-SIPHON DEVICE OR ELECTRICALLY OPERATED FUEL STOP
VALVE AT fUEL TANK WITHDRAWAL FITTING
ANTI-SIPHON DEVICE OR ELECTRICALLY
TANK lOP LEVEL
I
OPERATED FUEL STOP VALVE
FUEL LIKE ABOVE FUEL TANK
T OP
lE~V~EL~;_~=-~~.::::.~=:::~=:~
fUEL LINE BELOW fUEL TANK
TOP LEVEL
ANTI-SIPHON DEVICE OR ELECTRICALLY OPERATED FUEL
STOP VALVE AT POINT WHERE FUEL DISTRIBUTION LINE
GOES BELOW FUEL TANK TOP LEVEL
NOTE: The use of mechanical spring-type check valves instead of a solenoid shut-off valve is
not recommended, since these may tax the fuel lift pump's ability to draw fuel through them.
A check valve can trap debris under its seat which inhibits the valve's ability to close. In ad-
dition,
if
a check valve's cracking pressure is
100
high, this can contribute to vapor lock.
Should a mechanical type, spring-loaded check valve be used, it should be an adjustable type,
such as a Weatherhead #43 x 6. This adjustable type valve should be adjusted to have a
cracking pressure that will prevent siphoning when the generator is not operating but not so
excessive as to prevent the fuel lift pump from drawing fuel through the valve.
Strongly recommended is the installation of an approved filter/separator in the fuel supply between the fuel
tank and the generator's engine to help remove contaminants in the fuel before the fuel reaches the engine-
mounted fuel lift pump and carburetor.
IWARNING\
Gasoiine ieakage in or around the generator compartment is a potential cause of fire and/or
explosion. Repair leaks promptly and make sure the compartment is property ventilated.
Westerbeke Generators
26
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